diff --git a/gtk2_ardour/route_time_axis.cc b/gtk2_ardour/route_time_axis.cc
index 7c2eec941a..d9acf6bdc1 100644
--- a/gtk2_ardour/route_time_axis.cc
+++ b/gtk2_ardour/route_time_axis.cc
@@ -153,6 +153,8 @@ RouteTimeAxisView::RouteTimeAxisView (PublicEditor& ed, Session& sess, boost::sh
 
 	controls_hbox.pack_end(gpm);
 	_route->meter_change.connect (mem_fun(*this, &RouteTimeAxisView::meter_changed));
+	_route->input_changed.connect (mem_fun(*this, &RouteTimeAxisView::io_changed));
+	_route->output_changed.connect (mem_fun(*this, &RouteTimeAxisView::io_changed));
 
 	controls_table.attach (*mute_button, 5, 6, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
 	controls_table.attach (*solo_button, 6, 7, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND, 0, 0);
@@ -1822,3 +1824,8 @@ RouteTimeAxisView::meter_changed (void *src)
 	reset_meter();
 }
 
+void
+RouteTimeAxisView::io_changed (IOChange change, void *src)
+{
+	reset_meter ();
+}
diff --git a/gtk2_ardour/route_time_axis.h b/gtk2_ardour/route_time_axis.h
index 93e6b2035a..d615017ed3 100644
--- a/gtk2_ardour/route_time_axis.h
+++ b/gtk2_ardour/route_time_axis.h
@@ -105,6 +105,7 @@ public:
 	void show_meter ();
 	void reset_meter ();
 	void clear_meter ();
+	void io_changed (ARDOUR::IOChange, void *);
 	void meter_changed (void *);
 
 protected: